Ventilator for vehicles



May 12, 1936. w s HAMM YENTILATOR FOR VEHICLES Fiied July 12, 1933 Il!nulllmlr liz/Lann?? Patented May v12, '1936* UNITED STATES VENTILATORFOR VEHICLES William S. Hamm, Elkhart, Ind., assig'nor to The AdlakeCompany, a corporation of Illinois Application July 12, 1933, Serial No.680,051

2 Claims.

The invention relates to means for Ventilating closed bodies, such asthose of automobiles; and

particularly to means for controlling the admission of air thereto insuch manner that the entering currents are prevented from blowing uponthe occupants, being directed downwardly along a wall of the body andbecoming diffused before being brought under the influence of anexhausting ventilator or open window located to produce an outflow.

It has been found desirable to provide for the withdrawal of vitiatedair from closed vehicle bodies, as by means of ventilators such as thoseforming the subject of Letters Patent granted to me under date of March27, 1928, No. 1,663,630, and April 9, 1929, Nos. 1,708,133 and1,708,134. In order that such exhausting ventilators may function it is,of course, necessary that air be admitted to the body to take the placeof that which is withdrawn.

The common practice for the admission of fresh air has been to open awindow. When this is done the relatively rapidly moving outside currentsenter obliquely and in the direction of the rear end of the body, andreturn therefrom, without diffusion, upon the backs of the passengers,to their serious discomfort. The exhausting or scavengering ventilatorbeing usually located in the roof of the vehicle, the forwardly movingcurrents come within the zone of most active iniiuence of the outdraf-tbefore they are diffused and mixed with the air already inthe body. Thusthey frequently retard the movement of the vitiated air by satisfyingthe suction, and are of much less value than they should be in purifyingthe atmosphere.

The principal object of this invention is to provide for theintroduction of air, responsive to the lowering of the pressure withinthe body due to the action of evacuating means; the entering currentbeing directed downwardly and, moving at low velocity, being generallydiffused throughout l the chamber and not coming directly under theinfluence of the suction.

A further object of the invention is to provide for the admission of aircurrents in such'manner as to cause them to sweep over the inner surfaceof a sash or window and prevent the condensation of vapors thereupon.

In its broader aspects the invention consists in the combination of anexhausting ventilator with an-induction adjunct adapted to diiuse theentering air currents. sists in means.' usually associated with the edgeof a sash, for admitting a thin sheet of air and directlngit downwardlyover the inner faceof the sash. y

More specically it con- (c1. sis-2) The accompanying drawing disclosesthe invention.

Fig. 1 is a detail transverse vertical section through the casing andsash of a Window;

Fig. 2 is a detail longitudinal vertical section of the molding as shownin Fig. l, which receives the upper margin of the sash; and

Fig. 3 is a bottom plan view of such molding.

In this specification the Word window is used to connote the casing. andsash, and the word sash is used to connote either a glazed frame or aplate of glass without frame, it being the usual practice at this timeto use the latter form of sash in automobiles.

In the form of induction ventilator shown in Figs. 1, 2, and 3, the toprail of the window is shown at I5; and is provided with a longitudinalchannel in its lower face within which is tted a molding I6, ofresilient material, preferably rubber,as indicated, having in its lowerface a channel or slot for receiving the sash I'l. The molding channelis of greater width than the thickness of the sash, and its side and topwalls are crossed by a plurality of ribs I8, which provide a channelentering from below within which the upper edge of the sash will snuglyfit.

When the window is closed the glazing entering into the channel or slotin the molding, as I6, becomes a part of the wall, and this channeltakes the' form of an inverted U, and a series of restricted passages isprovided over the top margin of the sash for the entrance of an aircurrent following the direction of the arrows in Fig. 1. The enteringair current is preventedfrom moving backwardly within the vehicle body,in response to the general direction of the exterior currents, `by theribs i8, and is directed downwardly along the inner face of the sash.This current,`being in the form of a thin sheet, becomes diffused as itdescends, and consequently is not felt by the occupants. This diffusionbecomes general', with the result that the atmos phere throughout theentire body chamber is purified.

I claim as my invention- 1. In a window ventilator, a top casing wall aslotted top rail vof a window casi-ng and having a longitudinal vslotfor receiving a sash, and trans- 'verse ribs within ,the slot forengaging the sides and top margin of the sash.

